Pediatric Vulvar Lichen Sclerosus-A Review of the Literature

Long-term evolution of prepubertal-onset anogenital lichen sclerosus: A 35-year retrospective and cross-sectional study from a single tertiary care maternal and pediatric center

BACKGROUND

Anogenital lichen sclerosus (ALS) in children may persist after puberty with potential clinical repercussions.

OBJECTIVE

The purpose of this study was to evaluate postpubertal evolution of girls with ALS diagnosed in the prepubertal period based on physical examination, the persistence of functional symptoms, and the effect on quality of life.

METHODS

We retrospectively reviewed 65 cases of girls with prepubertal-onset ALS. Onset, signs/symptoms, photos, evolution, and treatment were collected from the medical records. Subsequently, 30 of these 65 patients were assessed for persistence of signs/symptoms by physical examination and/or standardized questionnaire.

RESULTS

Signs of active disease after puberty based on physical examination were present in 92% (N = 23) of examined patients. A high proportion of cases with persistent ALS after puberty were asymptomatic (47%, N = 14).

LIMITATIONS

This is a single-center retrospective study with a limited number of patients. Half of our original cohort could not be reached or declined a follow-up visit.

CONCLUSION

Prepubertal lichen sclerosus is a chronic condition that can be asymptomatic after puberty despite continued disease activity. We recommend long-term follow-up of patients with prepubertal ALS to prevent associated morbidity.

Outcomes of Temperature-Controlled Radiofrequency in Treating Vulvar Lichen Sclerosus: A Pilot Study

OBJECTIVE

This study aimed to evaluate the efficacy and safety of transcutaneous temperature-controlled radiofrequency (TTCRF) in the treatment of female vulvar lichen sclerosus (VLS).

METHODS

A retrospective analysis was conducted on VLS patients treated with TTCRF at our hospital between May 2021 and May 2023. Each patient underwent ten TTCRF sessions, spaced 1 week apart. Complications were monitored throughout the treatment, and efficacy was assessed using the Cattaneo scoring system and the Patient Global Impression of Change (PGI-C) questionnaire at 1 and 6 months Posttreatment.

RESULTS

A total of 40 patients were included in the study, with a mean age of 44.98 ± 11.14 years and a mean BMI of 22.78 ± 2.62 kg/m². Follow-up results at 1 and 6 months Posttreatment showed significant improvements in pruritus degree, skin elasticity, and skin color compared to baseline (p < 0.05), although no significant change in lesion scope was observed. According to the PGI-C questionnaire, 75% (30/40) of patients reported improvement or significant improvement at 1 month Posttreatment, which decreased to 60% (24/40) at 6 months. No adverse reactions were reported during the treatment or follow-up periods.

CONCLUSION

TTCRF is an effective and safe treatment for female VLS, offering significant short-term symptom relief. However, further research is needed to confirm long-term benefits.

Paediatric and adolescent vulvar lichen sclerosus: delay in diagnosis

Vulvar Lichen Sclerosus(VLS) is an uncommon, often misdiagnosed condition with a chronic course. Children presenting with VLS may have a wide variety of complaints, which complicates diagnosis. The differentiation of symptoms in the course of VLS causes great diagnostic difficulties. Delayed diagnosis may have an impact on vulvar architecture and long-term sexual health, and can often lead to frustration for both the patient and her parents. The aim of this study was to determine the reasons for delayed diagnosis of VLS in girls and adolescents and to investigate the number of different doctors and specialists consulted before the diagnosis of VLS, the symptoms reported, and the clinical presentation at time of diagnosis. We conducted a retrospective descriptive unicentric cohort study by reviewing medical charts of paediatric and adolescent girls diagnosed with VLS in a tertiary Swiss Centre. The average delay from first symptoms to VLS diagnosis was three years. Many symptoms went unrecognised despite consultations with a wide range of specialists. Once topical corticosteroids were prescribed, relief of symptoms was very quick, usually within one month.

CONCLUSION

Even for a wealthy country such as Switzerland, with ample access to healthcare and specialists, it still takes a long time to arrive at the correct diagnosis and treatment of VLS. Improving knowledge and understanding of VLS disease among paediatricians and healthcare providers could lead to earlier diagnosis and treatment, and thereby significantly improve patient outcomes.

WHAT IS KNOWN

•  VLS is a chronic, often misdiagnosed condition with a variety of symptoms in children. •  Delayed diagnosis can impact vulvar anatomy and long-term sexual health.

WHAT IS NEW

•  In Switzerland (Canton od Geneva), the average delay from symptoms to diagnosis is three years, despite specialist access. • Many patients see multiple doctors before diagnosis, highlighting the need for better awareness among healthcare providers.

"Vulva," Not "Private Part": The Importance of Accurate Genital Terminology

Effective communication in pediatric dermatology is critical for accurate diagnosis and treatment, particularly in sensitive areas such as the anogenital region. Unfortunately, children and their families often use euphemisms or incorrect terms when referring to this area, and many adults lack knowledge of anogenital terminology. Pediatric dermatologists can play a unique role in educating children and their families on correct anatomical language, which enhances body awareness, empowers young patients, improves safety, and contributes to accurate medical assessments and treatment adherence. By promoting the use of correct anatomical terms, pediatric dermatologists can improve patient outcomes and foster a healthier understanding of body anatomy and health.

Precancerous Lesions of HPV-independent Vulvar Squamous Cell Carcinoma: Clinicopathologic Consideration of an Evolving Spectrum

HPV-independent squamous cell carcinomas of the vulva comprise the majority of vulvar cancers, but their putative precancers represent only a small proportion of the vulvar squamous intraepithelial lesions that are encountered in routine practice. The precancerous lesions of HPV-independent vulvar squamous cell carcinoma encompass a spectrum of lesions that, collectively, may pose significant diagnostic challenges. Included in this spectrum are differentiated vulvar intraepithelial neoplasia [dVIN], the prototypical lesion of the group, which is characterized by a high propensity for progression, a relatively short duration to progression, frequent association with lichen sclerosus, and according to our review of the recent literature, TP53 /p53 aberration in 50% to 95% (mean 77.4%) of cases. Regarding the latter, some authors consider TP53 /p53 aberration to be a diagnostic requirement for dVIN, although this is controversial, as discussed further herein. Also included in the spectrum of lesions that are considered in this review are possibly related HPV-independent, p53-wild type lesions that have historically been reported as "vulvar acanthosis with altered differentiation" (VAAD), "differentiated exophytic vulvar intraepithelial lesion" (DEVIL), "verruciform lichen simplex chronicus" (vLSC), and which more recently, have collectively been described as "verruciform acanthotic vulvar intraepithelial neoplasia (vaVIN)" or "vulvar aberrant maturation (VAM)." In this review, we perform a comprehensive clinicopathologic review of putative precancerous lesions of HPV-independent squamous cell carcinomas of the vulva, with an emphasis on recent developments in terminology, practical diagnostic issues, biomarkers, and pathogenesis.

EuroGuiderm guideline on lichen sclerosus-Treatment of lichen sclerosus

INTRODUCTION

Lichen sclerosus (LS) is an inflammatory skin disease affecting all ages. LS typically involves the anogenital site where it causes itching and soreness; it may lead to sexual and urinary dysfunction in females and males; however, it may be asymptomatic. First signs of LS are usually a whitening of the genital skin, sometimes preceded by redness and oedema; fissuring, scarring, shrinkage and fusion of structures may follow in its course. LS is associated with an increased risk of genital cancer. LS has a huge impact on the quality of life of affected patients, and it is important to raise more awareness of this not uncommon disease in order to diagnose and treat it early.

OBJECTIVES

The guideline intends to provide guidance on the diagnostic of LS (part 1), highlight important aspects in the care of LS patients, generate recommendations and treatment algorithms (part 2) on topical, interventional and surgical therapy, based on the latest evidence, provide guidance in the management of LS patients during pregnancy, provide guidance for the follow-up of patients with LS and inform about new developments and potential research aspects.

MATERIALS AND METHODS

The guideline was developed in accordance with the EuroGuiDerm Methods Manual v1.3 https://www.edf.one/de/home/Guidelines/EDF-EuroGuiDerm.html. The wording of the recommendations was standardized (as suggested by the GRADE Working Group). The guideline development group is comprised of 34 experts from 16 countries, including 5 patient representatives.

RESULTS

Ultrapotent or potent topical corticosteroids in females and males, adults and children remain gold standard of care for genital LS; co-treatment with emollients is recommended. If standard treatment fails in males, a surgical intervention is recommended, complete circumcision may cure LS in males. UV light treatment is recommended for extragenital LS; however, there is limited scientific evidence. Topical calcineurin inhibitors are second line treatment. Laser treatment, using various wave lengths, is under investigation, and it can currently not be recommended for the treatment of LS. Treatment with biologics is only reported in single cases.

CONCLUSIONS

LS has to be diagnosed and treated as early as possible in order to minimize sequelae like scarring and cancer development. Topical potent and ultrapotent corticosteroids are the gold standard of care; genital LS is often a lifelong disease and needs to be treated long-term.

A Longitudinal Multiinstitutional Study of Vulvar Lichen Sclerosus: From Childhood to Perimenopause

OBJECTIVE

The main outcome of this study was the evaluation of clinical characteristics, comorbidities, and therapeutic approaches in patients with vulvar lichen sclerosus (VLS) aged from childhood to perimenopause. Secondly, it was intended to compare these characteristics according to the menarchal status.

METHODS

Patients less than 45 years of age with a diagnosis of VLS from January 2002 to June 2022 in 10 referral centers were included in this retrospective longitudinal study. The univariate analysis compared the dependent variables according to menarchal status.

RESULTS

One hundred eighty-six patients met the inclusion criteria. At diagnosis, between 25% and 40% of premenarchal patients reported signs related to subepithelial hemorrhage. A significantly greater presence of bleeding ( p < .005), easy bruising ( p = .028), fissures ( p = .008), petechiae/splinter hemorrhages ( p < .001), and bleeding/blistering or open sores ( p = .011) was observed in premenarchal patients with respect to the postmenarchal group. The perineum ( p = .013) and the perianal region ( p < .001) were significantly more involved in the premenarchal group. Topical calcineurin inhibitors were more used in the premenarchal population ( p = .004), whereas vitamin E oil and moisturizers were more used in the postmenarchal population ( p = .047).

CONCLUSIONS

Vulvar lichen sclerosus is a chronic condition that can cause vulvar changes that result in severe morbidity and affects sexual function and quality of life, even before menopause. Vulvar lichen sclerosus continues to be misdiagnosed in this population. This may lead to an average delay from symptom onset to diagnosis. Evaluating clinical manifestations of VLS in premenarchal and postmenarchal age allowed us to find different clinical characteristics between the 2 periods suggestive of the diagnosis.

Quality of life and burden of disease of vulvar lichen sclerosus: A single-center retrospective study in China

OBJECTIVE

This study examined the quality of life and burden of disease of vulvar lichen sclerosus (VLS) patients in three states of menstruation to better understand VLS.

METHODS

A total of 607 VLS patients were enrolled into this retrospective study. According to the ages of onset, menarche and menopause, the patients were divided into three groups: prepubertal group (n = 96), reproductive group (n = 400) and postmenopausal group (n = 111). Data were collected by direct interview and clinical examination.

RESULTS

A total of 93% of patients had itching, with a median numerical rating scale score of five. In the prepubertal group, the median score was three. Nocturnal itching occurred in 49.6% patients. Nearly half of the patients (45.9%) thought the itching affected their sleep. However, this ratio was very different in the prepubertal group (20.7%). Some patients (12.8%) cleaned their vulva more than seven times per week. Only 17.2% of patients experienced no effect on their sex life. The median dermatology life quality index score in all patients was six, but it was only three in the prepubertal group. The median number of hospital visits was two times, and the number of clinic visits was three times. Previous expenses, in median, were 2000 RMB. For 84.3% patients, the gynecologic clinic was their first choice.

CONCLUSION

VLS places great physical, mental and economic burdens on patients. Patients in the prepubertal group had milder symptoms and dermatology life quality index score. VLS should arouse the attention of patients and specialists.

Advances in the pathogenesis of vulvar lichen sclerosus

Vulvar lichen sclerosus (VLS) is a chronic non-neoplastic skin lesion characterized by vulvar itching, pain, atrophy, whitening of the skin and mucous membranes, and gradual atrophy and disappearance of the labia minora, which can eventually lead to vulvar scarring, causing functional impairment and seriously affecting the patient's physical and mental health. VLS can occur at any age, however, its pathogenesis and etiology are not fully understood. Considerable progress has been made in related research on genetic susceptibility factors, autoimmune disorders, collagen metabolism abnormalities, and their triggering factors in disease formation and progression. This article reviews the etiology of vulvar lichen sclerosus.

The efficacy of 5-aminolevulinic acid photodynamic therapy for pediatric vulvar lichen sclerosus

BACKGROUND

Prepubertal girls are one of the vulnerable populations of vulvar lichen sclerosus (VLS), which results in a decreased quality of life and increases risk of vulvar cancer. But the therapeutic effects of traditional topical remedies are unsatisfactory in some pediatric patients. 5-Aminolevulinic acid photodynamic therapy (ALA-PDT) is an effective treatment for refractory VLS patients, but no study has been conducted in child patients.

METHODS

The patients included in this study underwent three sessions of ALA-PDT at 2-week intervals. All patients were evaluated for objective clinical appearances and subjective symptoms quantitatively. Statistical analysis comparing parameters at baseline and after three-time ALA-PDT was performed.

RESULTS

A total of seven VLS girl patients were included in this study. Both primary objective appearances (lesion size and depigmentation) and subjective symptoms (itching and burning pain) were improved remarkably after the third treatment. Besides, adverse effects, mainly as pain and post-treatment edema, were mild and could be tolerated.

CONCLUSIONS

ALA-PDT is an effective and safe therapeutic option for VLS girl patients. Compared with adult patients, the symptoms resolved more quickly in child patients.

Insights from a joint pediatric dermatology-gynecology vulvar clinic: A retrospective study

BACKGROUND/OBJECTIVES

Pediatric vulvar disease has not been widely explored in the medical literature. Few studies focus on vulvar disease in skin of color. The vulvar disease can be distressing for young patients given the sensitive location, and providers may lack experience in diagnosing and managing vulvar dermatoses. We sought to characterize the conditions seen, diagnostic challenges encountered, and the racial and ethnic factors associated with vulvar diseases in our multidisciplinary pediatric dermatology-gynecology vulvar clinic at Children's National.

METHODS

Medical records of 220 patients who presented to our multidisciplinary pediatric dermatology-gynecology clinic were reviewed retrospectively.

RESULTS

Lichen sclerosus (LS) (36%, n = 80), inflammatory vulvitis (11%, n = 23), and vitiligo (9%, n = 19) were the three most frequent conditions observed. These conditions were often misdiagnosed as one another. There was a mean delay in diagnosis after symptom onset in LS patients of 16.43 months.

CONCLUSIONS

LS, inflammatory vulvitis, and vitiligo are common vulvar diseases among pediatric patients. Accurate diagnosis is important because LS must be treated aggressively to prevent sequelae. Further studies are warranted to help differentiate LS and vitiligo with consideration of skin tone.

Skin, Autoimmunity and Inflammation: A Comprehensive Exploration through Scientific Research

Human skin, as the body's largest organ, orchestrates a multifaceted interplay of cellular interactions that regulate essential physiological processes, including inflammation, immune responses, wound healing, and angiogenesis [...].

Clinical Review: Prepubertal Bleeding

BACKGROUND

Prepubertal bleeding is a common presentation in the pediatric office and can be distressing for patients and families. A comprehensive approach to diagnosis and management allows clinicians to identify patients at risk for worrisome pathology and arrange timely care.

OBJECTIVE

We aimed to review the key features of clinical history, physical exam, and diagnostic workup of a child presenting with prepubertal bleeding. We reviewed potential pathologies requiring urgent investigations and management, such as precocious puberty and malignancy, as well as more common etiologies, including foreign bodies and vulvovaginitis.

CONCLUSION

Clinicians should approach each patient with the goal of excluding diagnoses that require urgent interventions. A thoughtful clinical history and physical exam can inform appropriate investigations to optimize patient care.

Infantile perianal pyramidal protrusion: A retrospective review of 27 patients

BACKGROUND

Infantile perianal pyramidal protrusion (IPPP) is a rare benign skin condition that is typically seen in infant girls. This condition is often mistaken for other skin lesions such as acrochordons, condyloma acuminatum, and sequelae of sexual abuse. Many clinicians are unfamiliar with IPPP which can lead to aggressive workup and treatment. The purpose of this study was to elucidate demographic data, clinical features, diagnostic workup, and management of IPPP in a large cohort of patients seen at an academic medical center.

METHODS

A retrospective review of patients diagnosed with IPPP at Mayo Clinic, Rochester, MN was conducted. Demographic data, examination findings, diagnostic workup, and treatments were noted.

RESULTS

Twenty-seven patients with IPPP, 24 of which were girls and 3 were boys from the ages of 1 day to 4 years (mean 10.8 months, median 8.6 months) were identified. Symptoms were reported in 63% (17/27) of patients. Four patients received treatment with topical corticosteroid or local anesthetic. No patient underwent skin biopsy.

CONCLUSION

IPPP is commonly observed in healthy prepubertal girls. Constipation is a common symptom. Awareness of this entity may prevent overtreatment and unnecessary evaluation.

Comparison of electrophysiology therapy and glucocorticoid therapy in the treatment of 2 subtypes of vulvar epithelial non-neoplastic lesions: a prospective cohort study

Background

Lichen-like lesions with degeneration and pigmentation alterations can be divided into the following 2 types: (I) chronic simple lichen; and (II) sclerosing lichen. The etiology of the disease is unknown. This study sought to examine the therapeutic effects of electrophysiological smooth-muscle electrical stimulation in the treatment of lichen-like lesions of the vulva.

Methods

A total of 80 outpatients, who had been confirmed to have vulvar lichen-like lesions by vulvar biopsy at our hospital from November 2016 to March 2018, were prospectively included in this study. The patients received electrophysiology or glucocorticoid therapy. After completing a treatment cycle according to the clinical treatment routine, the outpatients were monitored at 1-, 3- and 6-month intervals. Patients used an improvement scale (i.e., the patient global impression of change scale) to score their subjective perceptions and subjective symptoms. The clinical curative effect scale was used to calculate the curative effect index and grade the curative effect.

Results

After 1 month of treatment, the active enhancement of simple lichen in the electrophysiological treatment group and glucocorticoid treatment group improved, while the active enhancement of simple lichen in the electrophysiological treatment group improved after 3 months of treatment. After 6 months of treatment, the subjective improvement score of the electrophysiological treatment group was better than that of lichen sclerosus. After 3 months of treatment, the effective rate of the electrophysiological therapy group was better than that of the glucocorticoid therapy group. After 6 months of treatment in the electrophysiological treatment group, the efficacy of simple lichen is also better than that of sclerotic lichen.

Conclusions

Conventional hormone therapy is easier for patients to accept because of its convenience and low costs.

Lichen sclerosus: The 2023 update

Lichen sclerosus (LS) is an underdiagnosed inflammatory mucocutaneous condition affecting the anogenital areas. Postmenopausal women are predominantly affected and, to a lesser extent, men, prepubertal children, and adolescents. The etiology of LS is still unknown. Hormonal status, frequent trauma and autoimmune diseases are well-known associations for LS, yet infections do not seem to be clear risk factors. LS pathogenesis involves factors such as a genetic predisposition and an immune-mediated Th1-specific IFNγ-induced phenotype. Furthermore, there is a distinct expression of tissue remodeling associated genes as well as microRNAs. Oxidative stress with lipid and DNA peroxidation provides an enabling microenvironment to autoimmunity and carcinogenesis. Circulating IgG autoantibodies against the extracellular matrix protein 1 and hemidesmosome may contribute to the progression of LS or simply represent an epiphenomenon. The typical clinical picture includes chronic whitish atrophic patches along with itching and soreness in the vulvar, perianal and penile regions. In addition to genital scarring, and sexual and urinary dysfunction, LS may also lead to squamous cell carcinoma. Disseminated extragenital LS and oral LS are also reported. The diagnosis is usually clinical; however, a skin biopsy should be performed in case of an unclear clinical picture, treatment failure or suspicion of a neoplasm. The gold-standard therapy is the long-term application of ultrapotent or potent topical corticosteroids and, alternatively, topical calcineurin inhibitors such as pimecrolimus or tacrolimus. Collectively, LS is a common dermatological disease with a so far incompletely understood pathogenesis and only limited treatment options. To foster translational research in LS, we provide here an update on its clinical features, pathogenesis, diagnosis and (emerging) treatment options.

In vivo evaluation of vulvar lichen sclerosus with reflectance confocal microscopy and therapeutic monitoring in children

BACKGROUND

Vulvar lichen sclerosus (VLS) in girls presents with itching, dysuria, and constipation and may result in the loss of vulvar architecture. In patients with an ambiguous clinical presentation, reflectance confocal microscopy (RCM) could be a helpful noninvasive diagnostic tool. The aim of this study was to describe the RCM characteristics of VLS and explore the clinical application value of RCM in therapeutic monitoring.

METHODS

Sixteen patients with VLS were included in the study. All patients were periodically evaluated clinically with RCM, and different treatment regimens were given based on the patient's clinical appearances and RCM features.

RESULTS

Some major key diagnostic features of VLS can be observed by RCM, including round to oval cyst-like structures with medium-to-low-refractive keratinoid substances (75%), thinning of the epidermal thickness (100%), destruction of the ring-like structures around dermal papillae (100%), disorderly distributed coarse medium-refractive fibrous material (100%),polygonal, plump, high-refractive cellular structures and linear low-refractive canalicular structures (100%). All of these characteristics had a high correspondence with histopathological features. The clinical manifestations improved after individualized treatment regimens based on the clinical appearances and RCM features.

CONCLUSION

RCM allows the visualization of major key diagnostic features of VLS and represents a valid option for objective therapeutic monitoring.

The Importance of Immunological Disorders in the Pathogenesis of Lichen Sclerosus in Pediatric Patients: A Systematic Review

Lichen sclerosus (LS) is defined as a chronic mucocutaneous inflammatory disease with a localization predominantly to the anus and genitals (vulvar sclerosus (VLS)). Pediatric lichen sclerosus (LS) is a chronic inflammatory skin condition with predilection for the anogenital area that if untreated can lead to scarring. Vulvar LS is characterized by two peaks in incidence: it occurs in prepubertal girls and in postmenopausal women. To date, several mechanisms and risk factors have been proposed in the pathogenesis of pediatric vulvar LS; however, the etiology of this condition is still not fully understood and constitutes a challenge for scientists and clinicians. The presented research aimed to systematically review the existing literature on the pathogenesis of pediatric LS and to identify possible underlying autoimmune mechanisms and molecular networks. The clinical presentation of pediatric lichen sclerosus and available treatment modalities are also presented to acquaint a broader audience with this underdiagnosed and undertreated condition. As a result of our review, we discuss several potential mechanisms, molecules, and pathways that have been recognized in this disease. The purpose of our review was also to summarize what we can induce in further studies, which will ultimately help to identify the mechanism responsible for the disease and aid in the development of new, more effective treatment strategies for diagnosis and treatment by clinicians and researchers.

Comparison of lichen sclerosus in boys and girls: A systematic literature review of epidemiology, symptoms, genetic background, risk factors, treatment, and prognosis

BACKGROUND

Studies concerning pediatric lichen sclerosus are limited, and, to date, there have been no studies comparing the course of lichen sclerosus in boys and girls. We sought to examine all publications on boys and girls with lichen sclerosus and assess and compare epidemiology, symptoms and signs, genetic background, risk factors, treatment, and prognosis.

METHODS

A systematic search was performed in the Embase, Medline, Cochrane, and Web of Science databases. Inclusion criteria were information on children ages 0-18 years and a clinical or histologic diagnosis of lichen sclerosus. Literature from 1985 to 2021 was reviewed.

RESULTS

A total of 1780 articles were retrieved from the search, of which 90 articles were eligible for inclusion. Boys and girls present similarly on many aspects; nonetheless, treatment and follow-up are approached differently.

CONCLUSIONS

Though the clinical approach is often different, lichen sclerosus in boys and girls demonstrates many similarities. More research is needed, especially on follow-up, to gain a better understanding of the course of lichen sclerosus and establish an advanced management plan for children.

High-intensity focused ultrasound therapy for pediatric and adolescent vulvar lichen sclerosus

OBJECTIVE

The study's objective was to retrospectively evaluate the efficacy and safety of high-intensity focused ultrasound (HIFU) for vulvar lichen sclerosus (VLS) in pediatric and adolescent patients.

METHODS

Pediatric and adolescent patients presenting to our hospital from June 2007 to July 2021, with VLS were retrospectively evaluated. The participants' information, including age, symptoms and vulvar examination, were documented, and they were treated with HIFU. The effectiveness of HIFU and its complications were analyzed.

RESULTS

A total of 36 patients with VLS undergoing HIFU for whom complete follow-up data were available participated in the study. The mean age of the patients at diagnosis was 13.3 ± 4.1 years. All patients successfully underwent HIFU therapy. The mean sonication time was 20.3 ± 8.6 min, and the median treatment energy was 3579.0 J. A few blisters developed in 8 (22.2%) patients and 2 (5.6%) had ulcers. The skin burns were treated medically without scar formation. On average, patients were followed up for 52.0 months after the procedure (a range of 6-175 months). At 6 months after therapy, the total response rate was 91.6%, and 86.6% at 12 months post HIFU. Overall, 16 patients were followed up for more than 5 years. The total response rate was 75%, and the recurrence rate was 12.5%.

CONCLUSIONS

Based on our results, HIFU was demonstrated to be effective and relatively safe for the treatment of VLS in pediatric and adolescent patients, but it is necessary to pay attention to the possible skin burns.